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A. [ji CRDWELL TELEGBAFH THNSMITER. APPLmMmN 111m 1111.111913. RENEwEU 061.291,1914.

l ,1 94,357. Patented Aug. 15, 1916.

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TELEGRAPH TRANS MITTER. APPLICAUON FILED 1m15.191s, RENEwED 001.29,

ALLEN D. CARDWELL, OF NEW YORK, N. Y,

TELEGRAPH-TRANSMIT'IER.

Specification of Letters Patent.

Patented Ano'. 15, 1916.

Application tiled January 15, 1913, Serial No. 742,111, Renewed October' 29, 1914. Serial No, 869,349.

To al] whom 'it mag/ concer/n lie it known that, I, ALLEN D. CAunwELL, a citizen of the United. States, and resident ot' New York city, borough of Brooklyn, in the county ot' Kings and State otl New York, llave invented certain new and useful lmproveinonts in Telegraph-Transniitters, of which the following is a specification.

My invention relates to improvements in mechanisms for transmitting electric in'1- pulses or signals to thereby etlect the opera tion of suitable receiving instruments to print or otherwise indicate the correspond'- ing.; characters or signals, the particular' tiai.srnitti'unA mechanisms l have invented tiring; applicable to a variety of such instrumeins and more particularly t0 that class ol instruments known as telegraph typewriters, v,h

The gene al object of my invention is to provide such a mechanism which will be aceurate, rapid and reliable in operation, and ot simple, compact and durable construction. My apparatus is therefore constructed with a view to the provision of means for controlling? the transmission of electric impulses; and operating means therefor comprising! a keyboard similar to that of an ordinary typewriter', or some similar or equally convenient mechanism, to be operated manually h v the operator.

Another object, ot' my invention is to prevent the sending,r of undesired signals and as part ot' the apparatus for this purpose, I provide means for retaining etl'ective, for a given length of time, the controlling means which are operated by the manipulation of the operating;r means therefor, and for retaining' ineffective the controlling means not so operated.

Another object is the provision of a novel contact-making device and reliable and etliciont operating means therefor, which shall he positive in action and eliminate, as tar as possible, inaccuracies of movement due to inertia. momentum and friction.

Another ohjcct is the provision of a transnuttin;r mechanism, all of the parts, of which are normally at rest, the necessary operating parts and the source of power for operating the same, being` set in motion for the transmission of each character or signal. and automatically brought to rest when such transmission is complete.

My invention turtlier comprises novel details ol' improvement and combinations ot' parts that will loe more t'ully hereinafter set 'truth and then pointed out in the claims.

ln the particular embodiment shown herein. uhiih is intended to illustrate an operativo form of my apparatus only, and not the onlil l'oi'm it may take, l provide means tor transmitting groups olf iiniiulses over the line to the receiving instruments. The groups arc made to ditler from one another by varying the character oi' -the component impulses and the dili'erent groups are adapted to canse the receiving instruments to print or other vise indicate the corresponding characters 'ir signals. l have shown means for tran; ittmg a ,group of three impulses on the line for each depression ot a key, and the impulses ot' each Asifronp may be ol` long` or short, or of long and short, luration as required, and may he positive or negative, or positive and negative.l in the desired sequence,

It will thus he seen that the form ot' my invention illustrated herein is one of its most highly developed and complicated ones, since it is adapted for use with impulses of four ditl'erent kinds, viz.: positive, negative. long,r and short. Such refinementI may not, however, he necessary, and my ap-A paratus may lie used in cfniiieotion with im pulses which differ in duration only, (litter in direction only, or which diiler neither in direction nor in duration. Also, since it is woll known that impulses an lic transmit ted through the other without the aid ot a metallic line. .l do not wish to limit myself to the use of such a line as a transmitting medium. Nor do l ivish to limit my in volition to the partiifular means herein dis closed, in any respect. sint-,e obviously many changes may be made therein without ileparting from the spirit ot my invention.

My invention further comprises novel details ot improvement and combinations of parts that will he more vfully hereinafter set forth and then pointed out in the claims.

Reference is to ne had to the accompany ing drawings forming` part hereof, wherein,

Figure 1 a plan view of a transmitter embodying my invention, parts being removed for the sake ot clearness: Fig. l is a sectional detail view of keys and a circuit Controllingl har; Fig. is an enlarged plan view of a portion of Fig. 1; Fig. 3 is a seetion on the line 3, 3, in Fig. 2; Fig. 4 is a section, enlarged, on the line 4, in Fig. 1, illustrating the position of magnet 27; Fig. 5 similar view on the line 5, 5, in Fig. l, the magnet 27 being fianitted; Fig. 5a is a detail face view of the circuit controlling shaft; Fig. (3 is an end view looking from the right in Fig. 1; Fig. 7 is a section on the line .7, 7, in Fig. 1; Fig. 8 is an end view looking from the left in Fig. l; Fig. 9 a detail sectional view on the line 9, 9, in Fig. 1, looking in the direction of the arrow. the section being also shown in Fig. l0; Fig. 1l) is a section on the line 10, l0, in Fig. l), and Fig. il is a diagram of circuits utilized with my improvements. l

Similar numerals of reference indicate corresponding parts in the several views.

The numeral .1 indicates a suitable frame iu which a series of key levers i2 are pivoted, as upon a rod or shaft 3, and which may be held in the upward position by springs i, stop bar l eontrollin; r the upward movement of the hey levers. and the Said hey levers are shown provided with key buttonsI 2 all oi wlin'h may ne arranged in any well linown manner. as in the manner of a typewriting machine. A sparing bar G carrieil by arms li pivoted upon rod 3 may also be arranged in the manner of the Spacing bar ii'i a tlvpewriling machine. A universal bar l' is pivotall)Y mounted in the Vframe upon a cross rod o'. beneath the liegst and spacingy bar.y to be actuated upon the depression of an); of the latter to close a eireuit as hereinafter explained.

Beneath the keys and spacing bar are a desired number of vircuit controlling bars l), il. suitably slidably supported on edge beneath the lol'vs and baring bar. l have shown three oll snel' bars il and three of suoli bars .l. guided l'or longitudinal movement in the frame., and to reduce friction upon said bars and maintain them in their proper positions. lY have shown groovcd rollers 10, 11 at opposite ends of the frame pivotally supported in the VFrame above and belowT Said bars. sewing also to limit lateral play of said bars. The bars i); Si', are provided in their upper edges; with recesses 1) having suitably disposed downwardly inclined edges ill'. the keys 2 being at right angles to said bars (Fig. 1) and in sueh positions that when a lcev is depressed it will engage the edge '3b of one or more liars 9. ll', to cause the latter to slide the required distance to the left in Fig. 1. rrThe h: l 9 that are not to be noved by lh.rl :l pressior" of any given key are rut awa;r in oppositi 'a to the inrlined edge or edges il olf the bar or hars that are to be operated bv such key, to thereby prevent operation of the undesired bars upon the depression of a given key. Bars i), il a re maintained pressed toward the right in Fig. 1 in their normal positions, for which purpose I have shown springs 12 engaging shoulders 9 on said bars, and said bars have suitable notches 9d providing shouldersl)e to engage stop 13, whereby said bars are held in normal position (see Figs. 9 and 10). Said bars i), 9', in connection with their actuating means are adapted to control the impulses sent over the line and in the present embodiment accomplish this by shifting the movable members 1l, 15 (Figs. 1 and 2) to determine the r'haracter and duration of the impulses, viz.: whether posi.- tive or negative and whether short or long. lt will be understood that if it is desirerl to transmit impulses which have the same duration or the same direction, or both the same duration and direction, this impulse controlling mechanism should be corre spondmgl)v varied. For the purpose ol illustration, the parts are so arranged that when a bar 9 is in the normal position, (Figs. 1 and positive current will be sent on the line, and when such bar is shifted negative current will be sent on the line, and when a bar 9 is in the normal position one l-haracter of impulse. such as short, will be sent on the line, and when such bar 9 is shifted a different character of impulse. such as long, will be sent on the line. The arrangement also is sueh that any ol` the bars 9 and 9 may or may not he shifted by a key, or all the bars U and S' ma)v he shifted simultaneous.y by a key, and for one combination or character oi" impulse sent it will not be necessary to shift any of the bars .l or 9, as hereinafter described.

The members 11 and 15 are shown' movablyy connected with corresponding bars il, 9 b v pin and slot eonneetions il', 15". Said members are not only adapted to be sliil'ted laterally, but are adapted to roch' to control the corresponding character of impulses. For this purpose said members are shown pi votally supported upon correspondin; r rock-arms 14, 15, to which said members are respectively pivotal] y Connected as at il), (Fig. :2). The l'nembers 14", 15 are pivotally supported on rod or shaft 17 carried by frame 1 (Figs. 2, 4 and 5). The members 14 are shown respectivel)7 normally bcneath projections 18 from shaft `19 that pivotally supported in the frame, which shaft carries an arm Q0, and when any of said members 14 are shifted from the nor mal position by the corresponding! bar i) such member will pass under a projection Q1 extending from a shaft 22 mounted in the frame (Fig. 5), which shaft carries an arm Q3. Arm 23 carries at its end insulation 23a adapted to close normally open Contact 24, and arm 20 has similar insulation adapted to close a corresponding normally open Contact 25, (Fig. 2). The arrangement illustrated is such that when Contact 24 is Mmmm i.;

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" H, 1S xI-M .1.1 if). Arms 1s (affrmiwu. spring h Siep. For this pmgnfacman! mut wis S 'ztchets und WM5 being so h 1% ailiiiilt-l to contro! ,iiieaiia for reainiiii the bari# il iii set position when operated liy zi ting r key'. ["or tliiijv purpose tlie :iriiiature la ol iiizignt-t i5 (Figa 8 aiiil V10) is provided willi a finger lo, in aliiieiiieiit with netvlies or rem-tues il oi' lia il. ..V (Fig. lll), :iileiiiteit \'.lii ii ai l iiiagiiet is energized aiiil liars il. il" are iii their iioriiiai positions to enter :mill iiotilirs iiiifl reliiiii ,will liarsy from iiioi'eiiieiit. ila:v i. Si also are shown Dre iiflefi iiitli iiirliiiifil esite lli {l"i;1. lli) atlaptefl lo lie engfzigee lli finger l-l' when said liar` ire liiltefl to Sie left in Fig'. l()` wliereliy at Silvi; time.r uiizii iiizigiiet energized :iiul tlu ifi'nje 9i of :i l-ar S or il li lit-fan si'iieil liy a finger key lo tlio left Figi ll). i'iiiglei' kif. will eiigagfv elige .ll a ietaiii rMieli liar in its f-:liiftei position.

rl'lie olii-ration may lie @lest-ribelli aS follows: lt will lie understood tliai with tiie arrangeiiieiih; illustratlwl tliree impulsi@ are to lie Sent uiioii lli@ liii.A for rai-li rliaraeter trans. iiiittiwl. vliii'li iiiiifuiswy may lie.- iiositii'e or negative in tlief tenui-uri required. unil oi lona or slioiii fliiiuitioii: iienre if a key is iloiiie al rori'eaiioiiiliiigf to Short iiiigiulses for tlii line tlie iiieiulwrs if will not lie liil'teil. :iiiii magnet will operate .i ii.

ii il :iiiiialui'e xi quickly, liut it our or more ot the impulses 'or a rliarari'w traiiiiiittefl is or are to be of lou-.I iliirzitioii. ilu-ii one or more liars Qi will la .#.iiiiteil iii' tlir ltei to cause tlie rorrespoi'iilinfr niriiilier l5 lo paw :miler tlie Correspond` in;` iiixijef'tioii ifi to low tlie riiruit at 2l?, ra using alor; iiioi'iiiieiit oi iiriii-.iture 2T `troni tiie ii'zagiiet 13T. ilu-relu' vausiing one or more ioni;l iiiiiiulw;` on the line. Lili'eii'ise 1t the riiarii i' to lie ti'siiisiiiittiil utilizesA all positive riiirtait. liirii the i'iieinlieis 14 will not la; ...iifleit fuit, it' yurli iiiiiulse: utilize nega tiifrurrrnt. tia-ii llie iiiemliers l-l will he ,sliiftml iieiieatli tiie Corresponding prou-C tions` 2l. :iiii'l ii' one or two iiiiiiiilses for a "liarai'ti-r are to la negative and one or two iiipulses for #urli rliai'iutw positive. tlien one or .i'o of tlir iiieiiilwrs 'l-i will lie `'lii'ftei'l be- 'iezitli tliirorrrsioiiiling profit ion '.fi. :intl an wi. Atomi! g tliiit :i rliaravter is to lie .-iiiiuittml .iur/iii.; omI negative, anti two .aiiice iiiiiiiiise all of iiliiirt lui-ation. then -ioiiiling: linger key is (ietlm liars. fl will lie shifted to i. Qa! ing ittv member ifi i. if li is oppor ,ineiiiliei4 il. Fig. 2) to paas under tlie Corresponding pi'ohiection 21, tlie fitlier tiro 'oars remaining Stationary, ati-l rioni-i ot tlie liars 1) and nieiiiliers 15 will lio shifted. Vl'poii the depression of such key circuit. y'ill ne rlfseil at fr, anil thereupon cur* rent will flow roiii the vliattery through a., g,

e, e, i. tliroiigli magnet 27, wirft il ani? resin# anni; j to tlie loatternyr7 also tl'iroiigli lf, /i and j to l'nitteiry. Magne 4-5 :intl 'i' will now lie eiieigixed7 aiiil upon tlitattraction of arma ture -if its projection 4G. by engaging the (alge if* of the shifted liar l) and by entering recefsfm 9 of tho balas` 9, 9', that were not iiiovod, will Cause Said bars to be locked in pimition; and magnet :57 will, by depressing :irii'i .l-l, cause shaft 32 and ita rains to rotate olio step, and ram 4l will immeiliately not upon pin i2 to Coiinert ff through conductor i'i with battery 1. whereupon projection 54" auting upon lever i3 causes the circuit of magnet 2T to lie broken only at e, and latch 4t. engaging projection '43, Cauies the circuit to rviziain operi :it e until armature 27 retui'iiii to iioi'iiial petition. during Wliirli roturii olz sziiil ariiifitiire af: ariii il is raised, the riitvlirtiy li are moveil si, further step, the sii-ruit of iii: k iet 2? remaining Clog-,il at T0, hiring wliiffli ps ol shaft 3Q and the Canis, tlir rain lll) (Fig, i5) ii ill have caused, its member li to lie raised and lowered to Ilose :mil open the Giri-.uit at 24 to transmit a negative impulse on the line :intl of short duration {lieefiuse Contact 2li is not now lirougat into at tion). When :trui ii luis reaelied tiiii limit of itz upv. aril stroke, ik projection 34,@ trips the lati-li all, thus i'eliawiiig lever 3* anti permitm ting the circuity to lio again -lo:-:ofl at e, therelivr musing 'Lilie iiiayi'iet :ZT to be arf/iin onergi'fiiiil. whereupon the saine operations are repeated for a further step by step roti'ition of shaft eiiiisiiig tlie ii'iternieoliaite unslii lteil iiieiiiiier lil lo operate the torroiponding proieetimi iii. thereupon closing; circuit at .i aiiil lriiiiaiiiitting positive current on tlie line (of `Qiort iluration, the circuits Still reiiiaiiiingzf rlosefl :it l'. and when the circuit tliroiigli Li" has been again olosed at e inagiiet 9T will be eiiergi'etl again with a like suit5 causing shaft 32 to rotate a further step forwari'l,y tlifrrelif1 eiiising the lower member H (Fig. 2) lo engage the Corresponding projection and raiise closing of the circuit again. ranging! ii, sri-oral poitive .impulse or. the line (but. of sliort flor-ation). At about the teriiiinat" 'in et tlie tliiril up stroke of arm 34 the nieiiiiiei o 3am il which has been liiil'fling the Giri-uit eloseil :it advances and. iieriiiits the cir-.zuitS to be broken. The, parts will have all been reatoreil to their normal positions. and there thus will have beenA tery, but as soon as the circuit has been broken at b and magnet 45 denergized, the projection 416 and its armature will have released all the bars 9, 9' and permitted the 0perated bar to be moved back to normal by its spring 12. Likewise, if upon the depression of a key. two of the members 14 are shifted under their corresponding projections 21,-

then two negative and one positive impulse will .be sent on the line for the depression of a key, and if three bars 9 are shifted by a key then three negative impulses will be sent on the line for the depression ot' such key, all of which would have been of short duration. If, however, upon the depression of a finger key an impulse of long duration is to be transmitted on the line, irrespective of whether the current sent be positive or negative,then, upon the depression of a linger key that controls, say, one of the bars 9 (irrespective of the movement of a bar 9) the movement of such bar 9 will cause the shifting of the corresponding member 15 beneath the corresponding projection 29a.

Assuming that the upper member 15 (Fig. 2) is shifted by its bar 9' beneath the corresponding member 29a, and that the upper f member 14 (Fig. is shifted, then a negative impulse of long duration will first pass on the line upon the closing of the circuit at a, as follows: Upon the rising of the aforesaid upper members 14 and 15, the operation of sending a negative impulse on the line will be as before stated, but on the rising vof said member 15, with such member 14, armJQS causes the circuit to be closed at 2G, thus short circuiting magnet 27, through lm,

6, 2G, a, and resistance, o, thereby causing armature 27 to stick at the pole piece of the magnet for a definite period, during which period a long negative impulse is caused to vflow on the line, but the battery is not short circuited on account of the resistance 'Upon the next two steps forward of cams 301 and 231a impulses of short duration will be sent on theI line, beeairse the said upper arm 15 will not then be operated, and because the two other arms 15 are not beneath projections 29a. If, however, tivo members 15 should be shiftedrupon the stroke of a finger key, then. two long impulses and one short impulse will be given of either positive or negative character according to the positions ot the members 14, and so like wise if the three members 15 are shifted by the operation or" akey, three long impulses will be thrown on vthe line, regardless of the positions of members 14. It will thus be understood that by means of three bars 9 each controlling a member 114;, and three bars 9', each controlling a member ifi, the members 14 controlling the character of current, such as positive or negative,tlnovvn on the line according to the position o the corre 15, if not shifted, permitting a short impulse to be sent, and if shifted causing a long im pulse to be sent, on the line, the desired .I

character of impulse of the desired duration is regulated or controlled, according to how the keys are caused to shift one or more bars 9 or one or more bars 9. If one of the keys or the spacing bar does not shift any of. the bars 9, 9 then upon closing circuit at a.,

three impulses of short duration and positive current will be thrown on the line.

While I have illustrated my invention as adapted to cause three impulses of varying direction and duration to be sent on the line each time a key or space bar is depressed, whereby a receiving instrument, adapted to operate (for instance) a type controlling mechanism, may operate upon the receipt of three impulses of appropriate direction and duration, it will be understood that the key controlling bars, the shifting membersand the contacts controlled thereby, and the corl responding cams, may be more or lessin number, to cause more'or less impulses to be sent on the line, on the depression of a key, or space bar,^and may be so arranged as to transmit successive impulses of the same direction and duration.

Having'now described my invention what I claim is:-

1. A telegraph transmitter comprising keys, contacts to transmit one 'character of current, contacts to transmit, adifferent character of current, means controlled by said keys to cause either of said contacts to be closed successively or t0..closev said contacts alternately,'jand means `controlled by said keys to vaiyg thevduration of the impulses transmitted through. said contacts. 2. A telegraphi transmitter comprising` keys, a lurality lof contacts to cause im pulses o different"` character respectively to be transmitted, a pluralityof membersto enable actuation 'of said contacts, each mem-- ber being adapted to actuate either ,of said contacts, means controlled by said keys to actuate said members, mechanism to operate said members, and means controlled by said mechanism to control the duration. of the impulses thrown on the lineby said contacts. Y Y

3. A telegraph transmitter comprising keys, make and break contacts, mechanism controlled by said keys for causing operation of said contacts,-an'd mechanism independent of the first named mechanism controlled by said keys for changing the duration of engagement of said contacts,

4. A telegraph transmitter comprising` keys, make and break cont-acts, merhanisin controlled by said keys for causing opera tion of said contacts, and mechanism nor- K iet mall y causing impulses of one duration to be transmitted by said contacts and adapted to be operated by said keys to cause impulses of a different duration to be transmitted by said contacts.

5. A telegraph transmitter comprising keys, make and breakcontacts, mechanism controlled vby said keys for causing operation of said contacts, other make and break contacts, a member to actuate the latter, and mechanism controlled by said keys to operate said member to cause the latter to vary the engagement of the first named contacts.

(3. A telegraph transmitter comprising keys, make and break contacts, mechanism controlled by said keys for causing opera tion of said contacts, other make and break contacts, a plurality of members normally in position with respect to the second'uamed contacts to permit impulses of one durationk to be transmitted by the first named contacts, and means actuated by said keys to shift said members with respect to the second named .fontacts to cause impulses of a dii'ierent duration to be sent by the first named contacts.

7. A telegraph transmitter camitrising keys, make and break co itirets, mgclianism controlled by said keys frdicausing operation ol' said contacts, other make and break contacts, a plurality of ngimbers normally out ol' operative relationy to said second named contacts to permit impulses ofA one duration to be sent by the first named contacts, and means actuated by said keys t0 operate said members with respect to the second named contacts to cause impulses of a diil'crent duration to be sent by the lirst named contacts.

S. A telegraph transmitter comprising keys, a piurality ol contacts adapted respectiveiy to transmit positive and negative current, means cfmtrolled by said keys to cause y a plurality of positive or negative impulses to be successively transmitted by said contacts n-spectively of short duration, and means controlled by said keys to cause impulses transmitted by said contacts to be of long duration.

i). A telegraph rent, means contro led by said keys to cau i a plurality ot successive impulses of diiertransmitter comprisingr ,y keys, a plurality olf contacts adapted respecl tively to transmit ositive and negative cura` adapted to transmit current of different c aracter, a memberto actuatesaid contacts, means controlled by Saad keys to shift said member to enable actuation of one or the other pair of contacts, another pair ol contacts, means to cause the last named contacts to vary the duration of the impulses transmitted by either of the first named pair of' contacts, a member to control the second named pair of contacts, means controlled by said keys to cause said member to enable actuation of the last named contacts, and means to operate said members.

11. A telegraph transmit-ter comprising two pairs of contacts, each pair of contacts being aapted to transmit current of different character, a member to actuate said contacts, means controlled by said keys to shift said member to enable actuation of one or the' other pair of contacts, another pair of contacts, means to cause the last named contacts to vary the duration of the impulses transmitted by either of the first named pair of contacts, a member to control the second named pair of contacts, means controlled by. said keys to cause said member to enable actuation, of the last named contacts, and means to operate said members, said last named means being controlled byf'the second named means. l

12. A telegraph transmitter comprising two pairs of contacts, each pair of, contacts being adapted to transmit current of difl'ei ent character, a member to actuate said contacts, means controlled by said keys to shift said member to enable actuation of one or the other pair oi contacts, another pair of contacts, ni xans to cause the last named contacts to vary the duration of impulses transmitted by either of the first named pair .of contacts, a member to control the second named pair ot contacts, means controlled by said keys to cause said member to enable actuation of the last named contacts, means to operate said members, said last named means being controlled by the second named means, and means to retain said key controll'ed means in set positions during operation of said contacts.

1. A telegraph transmitter comprising keys, two pairs of contacts, one pair of contacts being adapted to transmit current of different character from that transmitted bv the ,other pair of contacts, a projection connected with a contact of each pair of contacts, a member adapted to operate said projections, means controlled by `said keys to shift said member to and from the projections of said contacts, electrically operatingr means to causesaid member te operate said projections to actuate said contacts, and means actuated by said keys for controlling the' circuits of said electrically operating means. l

14: A. telegraph transmitter comprising keys, two pairs ci contacts, one pairof contacts being adapted to transmit current of different character from that transmitted by the other pair of contacts, a projection connected With-a contact oi'Y each pair of contacts, a member adapted to operate said projections, means controlled by said keys to shift said member to and from the proj ections of said` contacts, electrically operating means to cause said member to operate said projections to actuate said contacts, another pair et contacts, means to cause the last named contacts to vary the duration of the impulses transmitted by either of the irst named pair of contacts, said means being controlled by said electrically operating means, and means actuated by said keys for controlling the circuit of said electrically operating means.

15, A telegraph transmitter 'comprising keys, two pairs of contacts, one pair of contacts being adapted to transmit current of different character from that transmitted by the other pair of contacts, a projection connected with a contact of each pair of contacts, a member adapted to operate said projections, means controlled by said keys to shift said 'member to and from the projections of said contacts, electrically 'operatingmeans to cause said member to operate said projections to act-nate said contacts, another pair of contacts, a member tocause the last named contacts to vary the duration of the impulses transmitted by either of the first named pairv of contacts, means controlled by said keys to shift said member with respect to the last named contacts, said member being controlled by said electrically operating means, and means actuated by said keys for controlling the circuit of said electrically operating means,

16. A telegraph transmitter comprising `keys, two pairs of contacts, one pair of contacts being adapted to transmit current of different character from that transmitted by the other pair ci contacts, a' plurality of projections connected with a contact of each pair of contacts, :members eachA adapted to operate a projection oli said pairs of contacts, means controlled vby said keys to separately shift said-meinbers'to and fromthev corresponding projections of. said pairs of contacts, electrically operating means to canso faid rnrwmbers to operate said projections, to actuate said contacts, means actuated by said keys for controlling the circuit of said electrically operating means, another pair oi" contacts, and means to cause the last', named contacts to vary the duration of the impulses transmitted by either of the first named pairs of contacts.

y l?. A 'telegraph transmitter comprising irs oi contacts, one pair of con tact. i adapted to transmit currcnt'of dilierent character from that transmitted by the other pair ot contacts, a plurality of:

projections connected with a contact of each pair of contacts, members each adapted to operate a. projection of said pairs of contacts,.means controlled by said keys to separately shift said members to and from the corresponding projections of said pairs of contacts, electrically operating' means t0 cause said members to operate said projections to actuate said contacts, another pair of contacts, means controlled by said electrically operating means to operate the last named contacts to vary the duration of' impulses transmitted by the first named contacts, and means actuated by said keys for control/ling the circuit of said electrically operating means.

f1'8. A telegraph transmitter comprising keys, two pairs of contacts, a member adapted to operate either of said pairs of contacts,

-`a bar connected with said member to shift the same, means to permit said bar to be ,shifted said keys, an arm movably carrying said member, a cam to operate said arm, `electrically operating devices to rotate said cam, and means actuated by said keys for controlling the circuit of said electricallyoperating means.

19. A telegraph transmitter.comprising keys, two pairs of contacts, a member adapted to operate either of said pairs of contactsfa bar connected with said member to shift the means to permit said bar to be shifted by said keys, an arm movably carrying said member, a cam to operate said arm, electrically operating devices to rotate said cam, another pair otn contacts, a member to operate said contacts, a bar connected with the last named member to shift the same, means to permit said bar to be shifted by said keys, an arm movably carrying the last named member, a cam too'perate said arm and rotated by said electrically operating devices, and means actuated by said keys for controlling the circuit of said electrically operating means.

20; A telegraph transmitter comprising keys, two pairs ot contacts, a member adapted to operate either of said pairs of con- Ltacts, a bar connected with. said member to shift the same, means to permit said bar to be shifted by said keys, an arm mo'vably carrying said member, a cam to operate said arm, another psrir of contacts, a member to ,ierate said contacts, a lbar connected With the last named member to shift' the same, means to permit said bar to be shifted by sai'd keys, an arm movably carrying said last named member, a cani to operate 'said arm and connected with the irst named cam, electrically operating devices to rotate said cams in unison, and means actuated by said keys for contmliing the circuit of said electrically operated devices.

2l, A telegraph transmitter comprising pairs tu simuliinvnnaly nimmt@ me nl" lhe Hrgl'.- nud Second nnniwl inrnilwrs, :mfl nimm cnntrolled by will ,ka-w le ivtziin saxirl mm1- lwrb: in shifted position. while thv mirra pnneliilg; Carni; uhmm@ snizl membra.

37. [l luleglrnph tran." .iitlvr-irmnprisinl lfls. :i parir of lime rmitnrts, :i nimnlwr tl oprfri'u will minimis, mur-` mnitmllml hy .Suid lwys ts. pcrnli stahl niumlirr lo npcrzitv either nia :will (mmm :z nmgfnrl` means np- Qrsind lfy Smil nl. lo mutual@- smill :-m1lim^i,-. :umllifr pair of fm1- tml. :l .menubar in npr-mtli-nill muti-1cm, inc-fs cuntmllrd lay :will kuh: n prrmilr wml imwnlmr tu ope-mt@ ltlio shroud named min im @1, mums primr-il hy smid magnet t0 mim? Snill member lo :irlilmc wahl contacts, nl uns oper-:atrial hy said kryrs to Control lhe (rirrnit (if Suhl mug'iwl. means operated lily said inzxgnvl' to mnlrnl its circuit, :1nd u :slmrt drs-USL for mill magnet vmirnlled by lie Sec nml numwl l'ontzlrts tu mis lung impulsos to he' 'rinsmitlefl nlirmigli the first named 00ntac'ts', i

A telegraph muis-miller compr ng u pair 0%' line contacts, nimma :wturfiuwl l mill kvys tu cnnlrnl 'the rjqwrzition of szaill mnaifi, n magnet, www nperiitcil hy snirl magnet. tu www operation nl' ,lill rmiuirls7 ruw-inf; :ifiwmfl by :inl kQj-:S lar rmil'rnlling vli rirriit nl" @nifl imigfwl, melius opel-Mul liv :wilrnl iff; firluit, :mother pull' :if comizi fr means lznnl/rulled by the, hw., :miiwl rullini@ tn muse retalralwl upermzinn ai the, .fuiwnre nl' sind magnet tu rami, lung mpiilsvf to in trlnlsmiltecl hy lha inst nunmal @nulli 29. A 1l-,lc Ymph L rmnpriSing; 1:9315; :i pair nl' line '.nnlimctr means banim :zivil lfj vmill keys tl ronlrnl lie operation nl" :mid Mulisch-p a mangia-lil, jenem@ lipezrztml by :tri In fun-@e npm'utlfm nl: will wir e-rl by .miel kcyfor (foil-1 Smil nl;

lm lee.

trolling ihrV m magnet. inning npcrnlm lig, i lo contri-il its cir- Suhl mzig'nvt to musi* ng im; l lraxnsnlllml lay tlm limi rinniml Munnik il A\V telrgrnlvli liumrmllvr wi'ligwirlzrg kvys. liml runtzulw. nimm lli-4l l kljvs tu rmilml thv ulwriiim: hurts-u :i mugrnch mlnmsa ulwrsllwl nvt to :xl'tmltisixill l'mitzirls. n wir hummm. normally. (-loH-l mmmw lia nhl mi ruil. muur#y npmzilml h5' will nmgjml til 1 rl,\si\'vl v zirtimlc mill nwrmully flfiwil wirtzzrlvs, nurzmilly iipvn www s, in will rn'rnl. nwzins` :irtmiuwl lfy sail/l mzxlricft tu wlw hnlrl tlm limi, nnmvll millards rlnsml n" first numwl rnnlmts, nl' snial liingmlrii'razi upon :unl luso will circuit u prmlrlrrn:inail number of times, :1nd to lhen breuk miial -ircuit.

32. A tulvgmph trnnsmittsr fumarifdirg keys, line contar-ts, menus zwlimtml hy will keys tu uitrol 1hr opor-lilium nl' :alii-l wir tarts, zi muguet, moans opvriitml h v :will magnet to activate will conlurts. :i (frvml. l'wisaid magnet, unrimilly vlosull i'wiilnrnf, in Suhl circuit, menus' opcrntell h v mill lmgjiml; lo successiwly nrtlmtu 'mill mdrnmlly rln contacts. normally 0pm; wntnrts in ,--l .ill ruit, means zlctlmlwl by :mill nirigjmft il. :unl hold tlm lust nnmvll im f while the first manuell romarin nl .wml in nel, rirruit Open and Plum :anni rin-ull z. 3 determined number of inwskv :xml lu hm break Suid cirruit, unntlw" u Controlled hy thi' lust mimml n tain set Suhl uiruns mntrfillrxl uml a (fil-ruit, 'for thv lust misiwil 1 trnlled by sind lmyes.

33. A telegraph lirzmmilnur c keys. lin@y f.011turt: menus :irlzmlw keys to runtrnl lh@l opwrution of :l magnet, mmm upriitwl hy mill armate Said roulants. n rim-lill im' nlftfliormalljvj closed ruiiuxrlw in mail if means Urn-rated liv will mugnul 1 fiivwf-,- siwly antlmte snil'l iiwrwfllih normally upon runlmfs in mill Mrz-iii.. zirtiiutml hy 'suini iimgzirfi m llw4 thv lust numml nonzaitrl "lusml named unnlzlrts uf mid umgjzir und close sniwl ciruiig, u prwlnlvrminwl mail herof timos, :xml ln lhmi hrvzik :miki rirrii, :inutlier paul' of roulants. mmm :lrlfnlw l sulx'f'keys; to control thel lust imnml winnt ill mmm printf-fl ly #zml muguet to :utunte tlm lfm. .imuuil mutants` :uul menus wir trollml lry tlul lust nzmlml rontmfts to short flrcult uid umgruvt tu muse rctamlcrl upm-1rtiuxi ul it;-: :armature to muse lfmzgr impulses tf lie tramsmittml lay thv .first named C011- mts.

im. ilrlrgrupli trnnsruittcr cmuprisiug ffmitruhv tur :i liu(A rirruit. imams :utu- :Nul lay .will l\.^y.\ to runtrwl Huid ('uut:l t i. :i mnsjur-t` muur@ :irluzitwl lly said muguvt tu upf'rutv l l wurm-rm :i rirfuit fur smul lung um lmriug' uurumlly rlusml cuntnrt :uul unrumliy upm mmm' :xu Hrm wprrutml lly will im lt. mums npr-mitral lly1 11l l :lrm to Siu mwrznrly umlu-A :mil lircnk tlu; first uzuiwil ruaxtm'lrf. Ul url umguot rirruil. :i cmu up- 1' :al l luf mill :irxu tu slums :lull tmnporurily lmlil wlw-wl ilu swuml unuuil wulzlrts (if m i l umujlwl. rilf'uit. :xml umm#y oporaitml l'iy xl nrm tu iulrrmittvntly rotante suill rum.

trollcfl liy nifl `ifor cuit :it suicl @mitm tf:` :i umguct. lei res ai" crntml liy wild ummm' tu rctuiu ,will 1mi-uml uli-:ius in Acli pohitifm, :unl u CircuitJ fur will )mgmt mzurullml luy will keys.

539. trlrg'rnp: truirwiuittrr ruuaprfiugj kry umlsr :mil linut; contracts. lmr- :latir :itwl lay will lira tur ym-unwilling' ,\;1i\l wmtlu't. w lmr. liiiyiugf rmi-lxs :rml wlgr., :i muguet, n linggvr muirulml by mul .umgjucn to ritter suiil rvww tf ri-nin mul liars iu uoruml pmliiwm :xml tu fugfzigr mul algas tu rttuiu :will lima in hliillm puf.. u. i ir cuit 'fur suiil muguet :unl m nu, actuated luy Suiil liyrs tu rulxll'ill --:1 l eilfl'uit,

tuurmlittrr 'smitrulling Suiil ciror more of said members, a magnet, contacts in the circuit of said magnet closed directly through the operation of Aany of said keys, means controlled by said magnet `to retain the member or members in shifted position, a second magnet, means controlled by the del'ircssion ofA any of said keys for causing the operation of vthe second magnet, and electricallyoperating devices controlled by Said second magnet.

45. In a telegraph transmitter, 'means for 'controlli'ngr the transmissionotelectric impulses-comprising a 'plurality of movable members a plurality of keys each of which is adapted, when depressed, to actuate one or more of said members, a magnet, means -todirctly cause ope-ration of said magnet upon the .operation of one of said keys, means controlled by said magnet to retain 'the' member or members in shifted position,

means controlled by said Vmagnet to retain the member or men'ibers'in shifted position, electrically ope-rating means, and means controlling,r said electrically operating inca-ns di rectly upon the` depressionA of one of said keys ai d simultaneously with the operation of the' irst named .magnet Y 47. a telegraph transmitter, means for cont-rolling, the transmission of 'electric iinpulses?comprising a plurality of shiftablc bars; a plurality vot' keys, eaclrof which-is.- adapted, when `depresslul, to shift one or more of saidbars; means operated by the depression of any key forcontactingg with and locking the bar"or bars in shifted V,orV normal position; intermittently operative contact'lifsing means; and means for retainin, ,r

` said locking means in locking position throughout agsingle operation of tlie'gont'act-` closingmeans. Y

stil, transmitter of the class Cles/wibed. comprising a plurality of contacts, a shafts l`a plurality of'cams spaced'apart upon said shaft in varyingliositions for r'esptiiely operatin said contacts, means to 4rotate said shalt intermittently and means-to VarjT tbetizne of closing any o1 said contacts;

IlS''k-transmitter of the class described comprising a`p`lurality o t contacts'a shaft, a plurality of cams spaced apart upon said shaft in varying positions for respectively operating said cfuitacts, means torotate said shaft intermittently, electrically controlled devices for operating said means and means to vary the time of closing any of said contacts.

' :30.v The combination of a magnet, contacts in the circuit of saidmagnet, a member operative by said, magnet, an arm adapted to break said contacts, means to cause said member to operate said arm, means to retain' said arm in operated position, and means operated by said member to release said arm. i

51. The combination of a magnet, contacts i'n the circuit of said magnet, a member operative by said magnet, anarm adapted to break said contacts, means to cause said member to operate said arm, a latch, means to cause said latch to retain said arm'in operated position, andmeans torelease said latch by the operationot` said member.

The combinaticn of amagnct, contacts in the circuit ci said magnet, a member operative by .said magnet, an arm vadapted to break said contacts, meansto cause said member 'to operate sa id arm, nie-ans to retain said arm in operated position, mea'is operated 'by said member to `release saidarm,

normally open contacts associated nidi said' i magnet, and'meansoperated by said member to cause closing and 'openingof said contacts. v

53. The combination of a. magnet, contacts in the circuit: of said magnet, a member eperative by-said magnet,^an arma adapte-d to break said contacts, means to cause said member to operatesaid arm, means torctain said-arm in operated position, means oper ate-d by said member to relea's'e'said arm, other contacts in the magnet. circuit, a rotative n'ieinber normally holding said other contacts inoperatiie, and means operated by t'ne iii-st named i'nember-toactnaite the rotativc member for elosingand opening said other contacts.

54. A transmitter. o the class described comprising a plurality-oficontacts; a shaft; a plurality ofcainsspaced. apart on said 'lie shaft in varying positions olrespect-i'vely Voperating said contacts; and means to rotate said. shaftl intermittently comprising a mag.- net, contacts in the circuit ofsard. magnet;

. a member operativ@ by'said magnet; an arm adapted to break said contacts; means to cause said member tol operate said arm; means `to` retain said arm4 in operated. position; and means operated by said-member to releasey said arm.

55.' A transmitter of the class described comprising va plurality of contac s; a shaft;

shaft in varying positions 'for respectively operatingr said contacts; and means to rotate 'a plurality of cams spaced apart on said i said shaft intermittently comprising a magnet. contacts in the circuit of said ma "ne member operative by Vsaid magnet; an arm ada )ted to break said oontaCtS' m6421115 to cause said memberto' operate said armi, a latch; means to cause said latch to retain saidA arm in operated position; and means to release said latch by the operation of said member. i

55. In a telegraphtransn'iitter, the combination of lceys for 'controllingr the transmission of impulses, a plu ralit y of cont-acts, a magnet, means actuated -byv said magnet to o peratesaidV contacts, a circuit for said magnet, normally open contacts in said circuit adapted to be closed upon the depression ofany key, and normally closed contacts in said circuit adapted to be opened intermittently while the normally open contacts are closed. v

' 57. In a telegraph transmitter1 the com bination of a plurality of contacts, a magr4 net, means operated by said magnet to actuate said contacts, a circuit for said magnet, normally closed contacts in said circuit, means operated by said magnet to successively actuate said normally closed contacts, normally open contacts inv said circuit; meanscontrolled bysaid magnet to close and hold thelast named contacts closed while the rstgnamed contacts of said ina-gnet circuit open and-close said circuit a predetermined nuniber of times, and to then break said circuit.l

5 8; In a telegraph transmitter, the combination of a pluralityo contacts, a. magnet, means Aactuated bysai'd mag-netto operate said contacts, a circuit for said magnet having normally closed'contacts and normally open contacts, an arm operated by said magnet, nf1`e'ajrs operated by said arm to successivelyahake and, b-Leal".tl1,e .rst named contacts ofen-id magnetcircuit, a .cam operated by said'a'rm tofc'lose and temporarily hold close-et'l the second'-`-nanied contacts of said magnetcircuit, and? means operated by said arm t0 intermittently.rotate'said cam.

59. In a telegraph transmitter, the combination of apluality of contacts, a magnet, means actuated by said magnet to operate said contacts,'a circuit for said. magnet hav- Y lng normall \7 .closed contacts' and `normally opencontactg anarmoperated by said magnet, a leve-r to. be intermittently operated by vsaid arm to make andabreak` the first named `jcontaets of the magnet circuit, a. latch to temporarily retain said contacts broken, Ameans operated by said arm to canse said latch to release Said lever to. permit closing OtSa-id magnet circuit` a. cam to close the second named contacts of i the magnet circuit and retain them closed during the operation of the firstnamed contacts of said magnet circuit, and means opta-ated by Said arm to rotate said cam step by step.

(i0. In :i telegraph transmitter, the comlrination of a plurality of contacts, means for operating said contacts compi sing :i shaft with a plurality of cams mounted thereon,

and means for rotating said shaft step by step, comprising a ratchet secured thereto; a pivoted arm a paul carriedby the arm and adapted tocoiiperatc with the ratchet; an electromagnet for oscillating said arm' and means to vary thc time of closing any of said contacts.

(3L In a. telegraph transmitter, the combination of a plurality of contacts; means for operating said contacts comprising gr shaft with a plurality of cauis mounted thereon; and means forY rotating vsaid-.shaft lstep by step comprising af ratch'et-secured ther-cto; n piroted arm, ai pawl 'carried 'by the arm .adapted to cooperate withthe iratclret; an electromagnet f pr moving' said arm in ne direction; a spring ior moving,r it in 'the iipposite direction; and means controlled by said arnrfor rendering themagnet alternately effective and ineffective.

lln atclegraph transmitter, the combination of a pluralityo-contacts; .means for operating said contacts comprising a shaft with a plurality of cams mounted thereon; and means for rotating said'sli'aftst cp by step,comprising?y a ratchet secured thereto; a. pivoted arm; a pau-'l carried bythe arm and adapted `to cooperate with the ratchet;-

an electromagnet' for moving sziill arm'in one directionga circuit for Said electromagnet including4 normally closed. contacts adapt-ed to be opened by the varm when moved by the electromagnet, a latch to retain,said-coutacts open; and a spring,r to re" turn the arn'i, said arm being adapted when returned to trip said latch and permit said contacts tociose.V

(33. In a telegrapllrtransn'iitter, vthe combination of a pluralrty ot contacts; a. device for operating said contacts (xunp'risiingr a shaft with .a plurality -of..ca'ms mounted thereon; electrically operated means for rototing seid. shaft step by step; a starting circuit and a :working circuit for said electrically opcrated means, vand means to control said circuits.

64. In a telegraph transn'iitter, the combination of a plurality of contactsra device for operating,r said contacts"comprising n, shaft with a plurality of calms mounted thereon; electrically operated means for rorating said shaft stepby step; a starting circuit for said n'ieans, means control' said starting circu'itga working circuit for said means; :ind means to maintain said working circuit operating until a. complete cycle of operatious'of the contact olufrntiing,r device has terminated. Y

(S5. ln a telegraph transmitter, thc conminutionjof a plurality of contacts; a device for operating; said contacts comprising; n. .shaft with a plurality of canas mounted thereon; electrical ly operated means for roA 'toting said shaft .step 'oy step; a starting( circuit for said incansga working circuit tor Suid mama; mei-uns to (-mm'ol :md sinrigug Circuit; 11102115 tu shift milf!l x'st vmmm Hwang fmm thu 'Ln'ting ffl'mt, En Hw wmli ing Cirami n'l'w' snff mmm has :#mvd if operate; um] menus in nmilxluiu Hw wax-king Circuit Mosul unt-i] :r cnmpni cycv. if operations of the Contact qmmtng lungi@ has termiuaiiwl.

Sfnm! at New York city, in the county of Nvu' "fark, :md Stute 0f New York, this 14th 10 (inf M. January, D. 1913. 

